Improvement in cylinder-cocks



J. PORTEOUS Cylinder LCG ok 1 15 4 8 5 Mmm: JUN 271371 Fig.l.

INVENT @a ATTEST.

M' M s/f/ JOHN PORTEOUS, OF CINCINNATI,`OHIO.`

IMPROVEMENT IN cvLlNDER-cocKs.'

Specification forming part of Letters Patent No. 116,485, dated June 27,1871.

To all whom it may concern.'

Be it known that I, J oHN PoRTEoUs, or"Y Gincinnati, Hamilton county,Ohio, have invented certain Improvements in Automatic Discharge- Cocksfor Steam-Cylinders, of which the following is a specification:

This invention relates to that class of cocks or valves which is appliedto steam-cylinders i'or the purpose of discharging the water ofcondensation from the saine; and my improvement consists in constructingsaid cocks in such a manner that they will automatically open andrelieve the cylinder of Water as soon as any accumulates, and yet willremain closed against the 'pressure of steam.

The drawing is an axial section of a cylindercocl, embodying myimprovements.

A represents that portion ofthe device which is screwed into thesteam-cylinder. B is the barrel of my cock, which has the customarylongitudinal bore i), whose discharging end is capable of beingI closedby a valve, C, having` a stem, c, that plays Within a chamber, d, of theadjustable screw-threaded cap, nut, or handle D. Interposed between thetop o valve C and inner end of cap D is a helical spring, E, whichserves to retain said valve against its seat as long` as no Water is inthe cylinder; but as soon as any accumulates i therein the extrapressure of the same forces the .to suit the actual pressure ofthesteam, so as to discharge the water Without Wasting steam, and that thisadjustment can be promptly made at any time without removing any partot' the cock; nor can the cock ever be entirely closed by accident orotherwise. The stem o is confined to an axial position within the barrelB by means of Wings G, which project radially from said stem.

' l claim as new and of my inventionln the described combination withthe barrel B b, automatically-acting valve C c,- spring E, and

discharge-pipe F, the screw-cap D d adjustable from the outside, as andfor the object set forth. ln testimony of which invention 1 hereuntosetx my hand.

JOHN PORTEOUS. Witnesses:

GEO. H. KNIGHT, JAMES H. LAYMAN.

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